Web H264 preset not usable due tofailed gnome-codec-install codec retrieving

when trying to convert any video file with the Web H264 preset , the gnome-codec-install try to resolve the following missing gstreamer component :

GStreamer mp4mux faststart=1

Then the GCI fail and so Arista won't start the conversion.

I'm not sure but I think the gstreamer-good that ships with ubuntu should be enough to use at least mp4Mux ( not sure about FAAC )
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ApportVersion: 1.23-0ubuntu4
Architecture: i386
DistroRelease: Ubuntu 11.10
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
Package: arista 0.9.7-1
PackageArchitecture: all
ProcVersionSignature: Ubuntu 3.0.0-13.21-generic 3.0.6
Tags: oneiric
Uname: Linux 3.0.0-13-generic i686
UpgradeStatus: Upgraded to oneiric on 2011-10-12 (22 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare